Biology; Chemistry; Physics: Post your doubts here!

[Dark Destination]

How can we test a food sample for Fats, Starch, Reducing sugar, Proteins?
And how can we test a leaf for Fats, starch, reducing sugar?

Can someone give me a link to all the food tests, or explain them. ._.

 

[asadalam]

Y mass....wouldnt it stay same...its nit as if enzyme is making mass dissapear...

Thanks!And we can do the same for enzyme conc too right?just substitute the enzyme and substrate

 

[exploded diper]

I cant find the paper.....maybe froth made over ueast when it was respiring on dough ....measure amount of froth and thn compare with time...thts all i can make......,

Yeah you are right. Testing with Benedict and then observing colour depth is much more better

 

[Laibaaa]

Here are all the food tests.

 

[Awesome12]

I cant find the paper.....maybe froth made over ueast when it was respiring on dough ....measure amount of froth and thn compare with time...thts all i can make......,

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_w13_qp_62.pdf

 

[Dark Destination]

Here are all the food tests.

Thankyou.

 

[exploded diper]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_w13_qp_62.pdf

U said 2004

 

[Laibaaa]

Whats the difference between nitrifying bacteria, nitrogen fixing bacteria, denitrifying bacteria and i think there was another too? :/
Haaalp. Im dieing here

 

[exploded diper]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_w13_qp_62.pdf

There is no question bout froth in it.its just states froth on yeast.and no answer uses the word

 

[Laibaaa]

And have you guys done Ecology? Im just reading thru.
So scared, feel like i don't know anythinggg.

 

[Dark Destination]

And have you guys done Ecology? Im just reading thru.
So scared, feel like i don't know anythinggg.

I left that chapter. .-.

 

[exploded diper]

Going to sleep......
Hope we all get a* and distinctions....​

 

[Laibaaa]

Going to sleep......
Hope we all get a* and distinctions....​

InshaAllah!
How can you sleep at a time like this

 

[Dark Destination]

Going to sleep......
Hope we all get a* and distinctions....​

*Sigh*

I'm going to sleep too, even though i feel like i don't know anything.
But keeping my hopes high. .-.

 

[fathi12]

hi can anyone help me in getting the questions please I've been repeating the exam for 6 years I've lost hope in studying please i beg u guys

 

[fathi12]

I'm talking about the biology o level

 

[peacce]

hi can anyone help me in getting the questions please I've been repeating the exam for 6 years I've lost hope in studying please i beg u guys

6yearsssssssssssss? imean seriously?

 

[Dark Destination]

Whoa. Just finished the Bio atp exam. .-.

 

[Lilly2318]

how'd it go

 

[Dark Destination]

how'd it go

Normal. .-. wbu?